Re: linux-next: build warning after merge of the pm tree

[Rafael J. Wysocki]

On Monday, April 9, 2018 3:24:38 AM CEST Stephen Rothwell wrote:
> 
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> Hi Rafael,
> 
> After merging the pm tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
> 
> kernel/time/tick-sched.c: In function 'tick_nohz_idle_exit':
> kernel/time/tick-sched.c:1162:3: warning: 'now' may be used uninitialized i=
> n this function [-Wmaybe-uninitialized]
>    __tick_nohz_idle_restart_tick(ts, now);
>    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/time/tick-sched.c:1146:10: note: 'now' was declared here
>   ktime_t now;
>           ^~~
> 
> This appears to be a false positive.
> 
> And another in the x86_64 allmodconfig build:
> 
> kernel/time/tick-sched.c: In function 'tick_nohz_idle_exit':
> kernel/time/tick-sched.c:538:2: warning: 'now' may be used uninitialized in=
>  this function [-Wmaybe-uninitialized]
>   update_ts_time_stats(smp_processor_id(), ts, now, NULL);
>   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/time/tick-sched.c:1146:10: note: 'now' was declared here
>   ktime_t now;
>           ^~~
> 
> also looks like a false positive.

Yes, they are false positives AFAICS.

Cheers,
Rafael